Wayne Rooney's Old Trafford return ended in disappointment as Antonio Valencia's breath-taking strike set Manchester United on course for a 4-0 victory against Everton.
The win sees United move joint top of the Premier League, with an identical record to Manchester City after five games.
The build-up to Sunday's encounter revolved around the return of Rooney, United's all-time top scorer, for the first time since rejoining his boyhood club in the summer after 13 successful years in red.
Rooney was given a warm welcome at Old Trafford and left to a standing ovation, but it was Valencia that got fans on their feet as an outstanding half-volley kicked off a United win that ended 4-0 thanks to late goals by Henrikh Mkhitaryan, Romelu Lukaku and Anthony Martial.
Ronald Koeman has some serious questions to answer after Everton's fourth straight loss in all competitions -- an outcome that looked likely within four minutes as Valencia met Nemanja Matic's cross with a stunning effort.
Lukaku wasted a glorious chance and Juan Mata hit the post as United attempted to ward off the visitors' threat, with Rooney's 82nd-minute substitution -- the day before facing a drink drive charge at Stockport Magistrates' Court -- followed by a trio of late goals.
Mkhitaryan slotted home within seconds of Rooney's departure and then Lukaku fired home against his former club before Martial's stoppage-time penalty wrapped up a comprehensive victory.